A Pockels cell enabled heterodyne phase contrast imaging diagnostic for detection of ion cyclotron emission

Marinoni, A.; Moeller, C. P.; Rost, J. C.; Porkolab, M.; Edlund, E. M.

doi:10.1063/5.0101715

Title: A Pockels cell enabled heterodyne phase contrast imaging diagnostic for detection of ion cyclotron emission

Journal Article · 08 August 2022 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/5.0101715 · OSTI ID:1979137

^[1]; Moeller, C. P. ^[2];

^[3]; Porkolab, M. ^[3];

^[4]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; State Univ. of New York (SUNY), Cortland, NY (United States)

This work describes a novel optical heterodyne detection scheme that significantly extends the frequency response of the phase contrast imaging method to detect electron density fluctuations in tens of megahertz frequency range. The system employs a variable frequency electro-optic modulator to allow operation at any frequency in the range 10–40 MHz without the need to realign the system. The frequency coverage of the system makes it suitable to measure the radial structure of the electron density component of ion cyclotron emission on devices having confining magnetic field of a few tesla, thus extending the purely temporal measurements provided so far by magnetic probes.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-94ER54235; SC0016154

OSTI ID:: 1979137

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 93; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: A Pockels cell enabled heterodyne phase contrast imaging diagnostic for detection of ion cyclotron emission

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